On-Page Factors and Page Relevance
Keywords are intrinsically related to search terms words and phrases that people enter into a search engine to find specific information. Most people enter 2 to 5-word phrases in Google to find what they are looking for. Google in turn analyzes all pages in its index and lists the pages which contain those search terms. Each web page usually contains one or two keywords that are repeated more often than others throughout the site. These keywords dictate the theme of a website. In addition, Google analyzes other sites that contain links to your site. Specifically, Google looks to see if the text of a link (the clickable portion) that points to your site also contain those same keywords.